tracing: Disable kcov on trace_preemptirq.c

Functions in trace_preemptirq.c could be invoked from early interrupt code that bypasses kcov trace function's in_task() check. Disable kcov on this file to reduce random code coverage. Link: https://lkml.kernel.org/r/20220523063033.1778974-1-liu3101@purdue.edu

Congyu Liu committed 4 years ago

Commit bb5eb8f1 parent 154827f1 file · +4 −0Browse files

Unified · Split

kernel/trace/Makefile+4−0

@@ -31,6 +31,10 @@ ifdef CONFIG_GCOV_PROFILE_FTRACE · 30 unmodified lines
31	GCOV_PROFILE := y	31	GCOV_PROFILE := y
32	endif	32	endif
33		33
		34	# Functions in this file could be invoked from early interrupt
		35	# code and produce random code coverage.
		36	KCOV_INSTRUMENT_trace_preemptirq.o := n
		37
34	CFLAGS_bpf_trace.o := -I$(src)	38	CFLAGS_bpf_trace.o := -I$(src)
35		39
36	CFLAGS_trace_benchmark.o := -I$(src)	40	CFLAGS_trace_benchmark.o := -I$(src)